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 Forum index » Advanced Topics » Puppy Derivatives
Quirky Xerus 8.1.4 for Raspberry Pi2 and 3
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don570


Joined: 10 Mar 2010
Posts: 5343
Location: Ontario

PostPosted: Thu 24 Nov 2016, 20:20    Post subject:  

Barry wrote:
pakt,
If you have your 8192cu dongle handy, would you mind trying this?
You would have to do a reboot, or reload the module.


I have a rtl8192cu USB adaptor that would load but not make a connection
in version 8.1.1 . I will try your fix and see if a connection can be made.

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Sage

Joined: 04 Oct 2005
Posts: 5474
Location: GB

PostPosted: Fri 25 Nov 2016, 04:15    Post subject:  

Luv it or hate it, www.thepihut.com is offering v.3 B for £27 for the Black Friday weekend. Postage extra.
Well, Barry, pakt & co. could be a lot more folks depending on your expert touch come Tuesday morning!
A propos earlier discussion:
https://thepihut.com/collections/raspberry-pi-accessories/products/raspberry-pi-hdmi-to-vga-convertor
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BarryK
Puppy Master


Joined: 09 May 2005
Posts: 8926
Location: Perth, Western Australia

PostPosted: Fri 25 Nov 2016, 08:34    Post subject:  

BarryK wrote:
pakt wrote:
BarryK wrote:
Unfortunately, the 8192cu chip doesn't work with Quirky, at least mine doesn't, and there was one guy testing Quirky on the RPi forum reported the same thing.

Anyway, if you get your 8192cu wifi dongle to work with Quirky, let me know.

You're right Barry - my dongle doesn't work with Quirky either. I can set it up, but when it tries to negotiate a connection, it fails.

The log shows that the error starts at:
Code:
ioctl [SIOCSIWAP] : Operation not permitted


Actually, in this link, there is a possible fix;

http://linux-hardware-guide.com/2013-11-16-d-link-dwa-131-n300-usb-wifi-adapter

Which is this:

Create this file: /etc/modprobe.d/rtl8192cu.conf
With just this one line in it:

options rtl8192cu swenc=1

pakt,
If you have your 8192cu dongle handy, would you mind trying this?
You would have to do a reboot, or reload the module.


Oh, I have just realised that fix won't work, as the Pi kernel does not have the rtl8192cu.ko module.

Instead, they have compiled a 3rd party module, named 8192cu.ko, and I don't know what its commandline parameters are (running my laptop right now).

I am tempted to download the kernel source and compile it.

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watchdog

Joined: 28 Sep 2012
Posts: 1849
Location: Italy

PostPosted: Fri 25 Nov 2016, 14:37    Post subject:  

I have only quickly tried quirky 8.1.2. Seamonkey seems changed. I have garbled audio on net streams. Is there something I can better set for the audio problem? I use external speakers plugged to the audio jack.
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don570


Joined: 10 Mar 2010
Posts: 5343
Location: Ontario

PostPosted: Fri 25 Nov 2016, 17:28    Post subject:  

I am still having the same problem as Pakt
(referring to USB wifi adaptor)
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TeX Dog

Joined: 06 Jul 2016
Posts: 341

PostPosted: Fri 25 Nov 2016, 18:01    Post subject:  

Code:
WARNING: You are going to run omxplayer with -r/--refresh and you don't have xset and xrefresh installed (x11-xserver-utils package on Debian/Raspbian), this can cause black screen when it finishes playing.
Press any key to continue or Ctrl-C to quit.
#



That seems like a helpful msg. are those packages easy to get? -- YES used package manger found them with x11- search and also found ace-of-Penguins games Smile

Video playback fixed. FINALLY Wink
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pakt


Joined: 04 Jun 2005
Posts: 1156
Location: Sweden

PostPosted: Fri 25 Nov 2016, 18:34    Post subject:  

don570 wrote:
Barry wrote:
pakt,
If you have your 8192cu dongle handy, would you mind trying this?
You would have to do a reboot, or reload the module.


I have a rtl8192cu USB adaptor that would load but not make a connection
in version 8.1.1 . I will try your fix and see if a connection can be made.

Barry wrote:
Oh, I have just realised that fix won't work, as the Pi kernel does not have the rtl8192cu.ko module.

Didn't work for me either, then I saw the page you referred to had rtl8192cu.ko instead of Quirky's 8192cu.ko module. That explained why dmesg reported
Code:
[   10.254374] 8192cu: unknown parameter 'swenc' ignored

I spent some time trying to get my head around this wlan code, but didn't get very far with that Confused

I get the feeling the problem lies with wpa_supplicant somehow. I found the repetition in wpa_profiles/EC:08:6B:XX:XX:XX.WPA2.conf
suspicious (in case it's not apparent, I've modified the strings Wink )

Code:
ctrl_interface=/var/run/wpa_supplicant
ap_scan=1
update_config=1

network={
   ssid="my_ap_ssid"
   scan_ssid=1
               #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
      #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
         #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
      #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
            #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
      #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
         #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
      #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   #psk="my_wpa2_password"
   psk=acb4b6236c1068213c4babc38633fb13822bf9c8fe08040fbff1b22bf9c8fe08
   proto=WPA2
   key_mgmt=WPA-PSK
   pairwise=CCMP TKIP
   group=CCMP TKIP
}


Oh, yes, I was going to add some details of the Wi-Fi dongle I was testing:
Code:
[    2.778054] usb 1-1.2: New USB device found, idVendor=0bda, idProduct=8178
[    2.778083] usb 1-1.2: Product: 802.11n WLAN Adapter
[    2.778095] usb 1-1.2: Manufacturer: Realtek

It has the same Vendor / Product as the TP-LINK TL-WN823N v1

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minimalist

Joined: 26 Feb 2011
Posts: 9

PostPosted: Fri 25 Nov 2016, 19:41    Post subject: How is performance on a Pi3  

Hi guys,
I am considering getting a Pi3 and running Quirky Xerus 8.1.2. Are Seamonkey for browsing and email and Abiword for simple WP acceptably fast for home use? How about the ROX filer file manager? I am using CAT5 cable, not WiFi and don't do sound/video streaming.

Thanks,
Santa Claus
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TeX Dog

Joined: 06 Jul 2016
Posts: 341

PostPosted: Fri 25 Nov 2016, 20:18    Post subject:  

@minimalist more than capable, QX has been the fastest RPi3 OS so far speedwise. However you may need to ask about printing, does come with fully LibreOffice suite. Abiword has been crashing / compile issues so most are avoiding it for the time being.
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TeX Dog

Joined: 06 Jul 2016
Posts: 341

PostPosted: Fri 25 Nov 2016, 21:38    Post subject:  

BarryK wrote:
...

I wonder if bluetooth works from inside that metal case?


Yes only has to go about 6 ft no walls and floors like the WiFi. but my combo blue-tooth keyboard ( best I owned so far, have a few horrible first gen stuff ) doesn't get accepted by the QX wizard. it sees it as keyboard, but aborts early, newer FatDog64 sees it and understands it as a touchpad/keyboard no codes needed just accept pairing.
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TeX Dog

Joined: 06 Jul 2016
Posts: 341

PostPosted: Fri 25 Nov 2016, 22:05    Post subject:  

That Puppy Package Manager has lots of linux games, also installed a ray tracing program. ( give the metal case a heat sink workout ) pingus works, got ScummVM, super Tux, superKart.(massively large???).
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Sage

Joined: 04 Oct 2005
Posts: 5474
Location: GB

PostPosted: Sat 26 Nov 2016, 04:11    Post subject:  

Some users seem to be amassing quite large total file counts? What is the preferred strategy? SD card boot, expensive 128Gb SD card for boot and storage, (USB boot?), USB stick storage, external USB HD storage, ssd ditto?
How reliable is SD long term? USB sticks have had a chequered history over lifetime and write/rewrtie limitations? Not sure ssd s are completely exonerated either and still vastly overpriced, although relatively low power consumption relative to their capacity. Experience suggests that (mobile) USB HD s are now reliable with mtbf matching expected lifetime of the many long-term supported distros, notwithstanding they are old technology involving moving parts.
Would welcome advice and suggestions, please.
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pakt


Joined: 04 Jun 2005
Posts: 1156
Location: Sweden

PostPosted: Sat 26 Nov 2016, 06:32    Post subject:  

BarryK wrote:
I wonder if bluetooth works from inside that metal case?

Quite well, surprisingly. The antenna in the die-cast case even picked up a BT speaker I had across the room, about 3 m (~10 ft) away.

The case has narrow cutouts for cables (GPIO, camera, etc) and I would think that the radio signals easily pass through these openings, although not evenly in all directions.

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pakt


Joined: 04 Jun 2005
Posts: 1156
Location: Sweden

PostPosted: Sat 26 Nov 2016, 10:24    Post subject:  

EDIT: An important note regarding the stress tests made below. The Raspberry Pi 3 runs in a Powersaving mode by default. With the Pi3 in this mode, the CPU is only running at 600MHz and running the stress test will result in a deceptively low final temperature.

To check the power mode the CPU is running, in a terminal, run this command:
Code:
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

By default, it should report:
Code:
powersave

The CPU is only running at max 600 MHz!
To get the correct results for the stress test, run this command:
Code:
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

Checking again:
Code:
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

It should now report:
Code:
performance

The Pi3's CPU is now running at a constant 1.2 GHz

END EDIT

I've been thinking about the stress test I made earlier that surpisingly showed that the passively-cooled metal case kept the SoC temperature significantly lower than when the SoC was cooled with a large heatsink and fan.

What I forgot about, and that which is not seen in the product photos, is that the bottom half of the case has a large slug that lines up with the RAM chip attached to the bottom of the Pi2 & Pi3 boards.

The effect is that when the screws that hold the case together are tightened, the metal 'posts' on the top half and the slug on the bottom half (marked by red ovals in the attached image) pinch the board quite hard.

The bottom slug is in close contact with the large metal mass of the case, so it would probably carry away most of the heat from the board.

All this is assuming a thin layer of some kind of thermal padding (dough) is placed between the metal and the chips they're aligned with. The top surfaces of the metal posts and slug are not even - no machining done here, just the limitations of die-casting. So some kind of thermal gap 'filler' is needed.

I'm including the chart I posted earlier with temperature readings using the same script ExplainingComputers ran. The 1st & 2nd columns are from the tests done by ExplainingComputers (@ 22 C room temp). The 3rd column has the readings I made from the metal case (@ 20 C room temp).
Code:
Heatsink only  Solution w/heatsink & fan  Geekworm case only (NO FAN)
-------------  -------------------------  ---------------------------
temp= 43.5 C   temp= 40.2 C               temp= 39.7 C
temp= 70.9 C   temp= 59.1 C               temp= 47.8 C
temp= 76.8 C   temp= 59.1 C               temp= 48.3 C
temp= 78.4 C   temp= 59.6 C               temp= 49.4 C
temp= 80.1 C   temp= 60.7 C               temp= 49.4 C
temp= 80.6 C   temp= 60.7 C               temp= 50.5 C
                                          temp= 50.5 C
                                          temp= 50.5 C
                                          temp= 50.5 C
                                          temp= 51.5 C
                                          temp= 51.0 C

Note that I ran the stress test twice as long (10 iterations instead of 5) to offset the thermal buffering effect of the metal case.

The chart clearly shows the slower temperature rise with the Pi3 in a metal case, the case acting as a thermal buffer, warming up more slowly.

I've attached a couple of photos I made that show the 3 contact points of the metal case.
case_inside_side_view.jpg
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case_inside_side_view.jpg

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Last edited by pakt on Mon 05 Dec 2016, 04:31; edited 5 times in total
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TeX Dog

Joined: 06 Jul 2016
Posts: 341

PostPosted: Sat 26 Nov 2016, 10:34    Post subject:  

@sage the cmdline.txt file can be edited like this
Code:
dwc_otg.lpm_enable=0 console=tty1 root=/dev/sda3 rootfstype=ext4 elevator=deadline rootwait quiet splash ramdisk_size=32768

To use a usb harddrive /dev/sda3 as its root / this keeps the problems down. sdcards are still very expensive per M. in my setup do a bunch of testing then write to sdcard after getting it comfy. do wish kparted came in QX so I can pull apart the image file. Hem wonder if its in package manager, found a race car simulator with openGL took hour to download! and it ran SO slowly..
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